This scope item covers the follow-up material and component date effectivity-controlled mass change process of one or more Engineering Bills of Materials (BOMs). To control the replacement date of the follow-up component or material, you first create a date effectivity-controlled change master. When you start the Where-Used List application with the component or material to replace, all BOMs are listed. To replace the component or material of one or more Engineering BOMs, the BOMs must be selected. The change number is used to manage the phase in date. All changes are managed as draft changes and must be confirmed before setting the change number status to inactive to finalize the mass replacement process.